Home / 19,931,874.30-29,897,811.45-12,721,991.40

Finding the Fourth Proportional to 19,931,874.30, 29,897,811.45 and 12,721,991.40

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Solution

The fourth proportional to 19,931,874.30, 29,897,811.45 and 12,721,991.40 is: 19,082,987.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,931,874.30 : 29,897,811.45 = 12,721,991.40 : x
  2. Step 2: Convert to fraction form
    19,931,874.30/29,897,811.45 = 12,721,991.40/x
  3. Step 3: Cross multiply
    19,931,874.30x = 29,897,811.45 × 12,721,991.40
  4. Step 4: Simplify right side
    19,931,874.30x = 380,359,700,145,721.56
  5. Step 5: Solve for x
    x = 380,359,700,145,721.56/19,931,874.30
  6. Step 6: Final answer
    x = 19,082,987.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.